Aerosol impaction

Aerosol Impaction is the process in which particles are removed from an air stream by forcing the gases to make a sharp bend. Particles above a certain size possess so much momentum that they can not follow the air stream and strike a collection surface which is available for later analysis of mass and composition. Removal of particles from an air-stream by impaction followed by mass and compositio analysis has always been a different approach,as to filter sampling, yet has been little utilized for routine analysis because of lack of suitable analytical methods.

Advantages

The most clear and important advantage of impaction, as opposed to filtration, is that two key aerosol parameters, size and composition, can be simultaneously established.[1]

There are many advantages of impaction as a sampling method:

Disadvantages

There are also several disadvantages to impaction as a sampling method:

See also

Deposition (Aerosol physics)

References

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